Safety car-control equipment



Feb. 24, 1931. J. c. MccUNE SAFETY CAR CONTROL EQUIPMENT- Filed Nov. 1,192e AD M3983 H3 Nada uova Patented Feb. 24, 1`i931 Nit t. l,SAFErvoAR'-ooivrnon noui'rivinivi" Appneatiqn inea Novemberri,iezel'fseriaiirov. 315,539.Y

This invention relates to fluid pressure brakes and car doorVcontrolling apparatus' and more particularlytosafety car control providean improved tioned objectionable features.

' ply of fluid under eouipmentl Y Y Y. Y vv il I c i. 4 i

Win the ordinary sarety'car control equipe nient, the operatorinay,

to a stop, first effect aflieavy application of the brakes and then,asthespeedof-the car is reduced, graduate the ubrake. application olf.Vheirthev speed ofltliecar is reduced n to the speed which the operator,inhisjudg nient, thinks Vsafe to open the` door or doors, lie'operatesYthe fusual -brake valve device to door open position Vin svliiclfnthedoor ordoors are opened, thus the time for opening the door or doors andthespeed ofthefcar at thetime the doorsare openedli's entirely dependentupon the operators judgment. Y if urther,'wlien the operator Y movesthe'4 brake valve of the vordinaiy safety-carcorrYAY trol equipment Itodooropen position,- a yfull service application of the brakes iseffected, and'rthis heavy application ofthe brakes, es-y pecially whenthe car is operating at slow speed, causes the *car to come toa suddenstop that. it places which is very objectionablein undue strain on thev'brake rigging and car as a whole,- and also'causes discomfort to thelaa'ssengersin thercar.

'The principalobject of my invention is to safety car control equipmentin which the opening of *he cardoor or doors is dependent upon the speedof the car,

and which will be free from the above men-V Another object vof myinventionV isA to pro.-V `vide an improved safety car-control equip menthaving' meansY operative or doors untilthe speed'of the car has beenreduced to a predetermined low'speef.

A further object of my invention is to provide an improved safety carcontrol'equip-V ment having means for maintaining the su pressure tothebrake cylinder closed off, and'forpreventing the dooror doors fromopening when the equipment is in door open position, until the speed ofthe car is reduced toa predetermined low speed.

V'A still further object ofmy invention is to in bringing the carlspeed.`

automatically p for preventing the opening of tlie'vcar door provide animproved safety caricontrol I ment in which, with; the

equipmentA in ,door open position, a full service application ofthebrakes, can be effected only after the speed,l of thecar is reduced to aVOther objects and ladvantages Wilt-appear from the more descrp tion. ie

In the :accompanying drawing'the single, 1rrgure 'is adia-grammaticvie'vv, partlyvuin sec- Y' bodying -myv invention, onlyysuch portions of the equipment being shown as is ,deemed'nec- Yessaryto a clear understanding of the nvention.

thedrawin'gis of the double end type and may comprise an electric motorlf for driving the s car, afmagnet switch device2gwhioh is opera tivethrough the operationofi the usual' con erzcurrent supply sourceto, themotoijL'abrake Control Switch Ldevice 1 magnet valve devices which isoperative to controlthe operation of a door Vengine 12, only one `of theenginesbeing shown, a door relay magnet switch device 13,

predetermined low:

The safety car' controlu equipment shown iin 8,19, 10 and ll, each bftion, ofa safety car control equipmentem- I a resem/oir 14g-a magnetValvegdevicerl oper! Y ative to control the supply of fluid under pres.y'I V lsure tothe usual brake cylinder loto applyv the brakes and amagnet valve device 1'7 ative tocontrol the discharge 'of sure v vfi'omVthe brake'.V cylinder 'to rakes. i v i Each ofthe brakecontrol'swit'ches 4c and 6 may'comprise va rotatable Contact drumwhiclioperiluid pres- Y' release. the

is shown diagrammatically in the drawing Y and `may be operated throughthe medium of the usual operating handle (not showntlie operatingpositions of the handle being designated on the drawing. i Y The drumVof the control'switchy 4 is vided Withzelectrically connected contacts18 to. 26 inclusive. andthe switch 6 is provided with f like contactsV27 to 35 inclusive. The

` been given Separate reference l which are adapted tacts on the drum oftons, thequadrant59 vwill be operated to openv jcontaining respectively,pistons 56 and vor close one ofthe doors --ot a valve device 60 Vmayarrangement of thecontacts on the drums ot 6 are identical and havetheswitches 4 and characters only the description for the purposeoirendermg more clear.

The 'brake control switch 4 may' alsocomprise contact termina to contactwith the con- Y the switch, and the control switch y@is providedwith-like contactfterfminals 41 to 45 inclusive.

Each ofthe selector switches 5 and 7 may comprise a rotatabledrumwhichmis"shown diagrammatically in the,` drawing and maybe operatedby the use of the usual operating handle -(not shown).

The drum ofthe selector switch '5 is provided with contact 46'adaptedtovcontact `with contact terminals`47,48 and'49,fandtheeratedfby'said-piston.

l The operation ot thevalve'device -60 is controlled lthrough-theoperation ot the mag'- nct valve device 8 magnet for'controllingthe'operation of double beatvalves`64 and 65 containedinvalve chambers66 and 67 respectively, thechamber 66 being connected to atmospherethrough a is comiected'tothe reservoir 14gby 'way oi vto' gro-unconnected to alcontact 81`w1th vwhich a conpassagc GS-a-nd' the chamberl67l being-connected -to the-reservoir14through--pipe and passage69. l

rl`lie valve chamber 63m the valve device 60 passage and pipe 69V andthe pistonch amber 70 at the oppositefside ofthepistonl is connected toa chamber 71 in the magnet valve device y8 through passage' and pipe72.Vl

The application magnet valve device 15 may ycomprise a magnet 173 and avalve 7 4 controlled bysaid magnet. The release mag net valve device 17may ,comprisea magnet 7 5 and a valve 76 controlled by the magnet 75.

The magnet switch device Q may comprise amagnet 77 and connectors 78 and7.9 -controlled by said magnet.. One

d at -8Of andthe other terminal is tact 82 o-i the usual controller (notshown) is ls 36 to 40 inclusive` Ywhich causes: the connectors which`may comprise .ak

terminal ot lthe magnet maybe .permanentlyV connected adapted to'engage'in all on positions oi the controller.

The' door relay magnet valve' device 13 may comprise a magnet 88 andconnectors 84 and 85 controlled by said magnet.

As shown in the drawing the brake contro-l switch device 4 at-the headend ot the carV is in release position and the brake control switch 6 atthe reary of the car in handle oli positionfa'nd the brakes released;The lcar controller is'also in'oii position.` Now-when the controller isturned to on position-,the

contactSQ'will engage thecontact 8 1 and current from the` trolley. wire8 will flow through the current supply "wire 86, branch wire 87,contacts 82 and 81, and through the magnet 77 to: ground 80thuslenergizing the magnet moved upwardly.y rhe connector 78 inits upperposition connects contact Aterminals 88 and'89 and current from thesupply wire 86 will low through the Contact terminal 88, connector 78,contact terminal v89, a wire 90, magnet 83,)wire 9 1, motor 1, andwire 92 to ground at93, thus completing the -motor circuit causing themotor to operate to drive the 7'8 and-79 to be Now,`if it isdesired torender' the motor inv operative to drive thecar,'the car motorcontroller is operated to poner oit position, the

co-ntact'f82 is moved out of contact with the. contact 81 openingthecircuit through the magnet 7 7V andcausing it the magnet 77781will2move Y lownw ardly out of `connecting engagement with thecontacts 88 and89 thus` opening the motor circuit,` and the connectorl79-will move downwardly into contactwith Contact terminals 94 and 95.Connected to Vthe yis a w1re196 which is alsov connected-to the wire90conn'ected to oneterminal ot the magnet 83. o The momentum ot thev carnow causes the motor 1 to be driven and the counter E. M. F. of themotor causes an electric current'to flo-w throughV wire 91, magnet 83,wire 90, wire 96, contact terminal 95, connector79, contact terminal 94,and back to the motor thro-ugh wire 92, thusl providing .av circuitthrough which the Ymagnct88 ,is maintained energized afterthe circuitthrough the con nector 78 is opened. v l. y

Niththe' control switch device 4 at one end othe car in releasepositionand the control switch device 6 atthe-other end of the carin handle olfposition, current from a battery 186, having one terminal permanentlyconnectedto ground'v at 97,-;'lows thro-ugh wire 99,- contact 41,contacts switch device 6, .contact 42,fa wire 100, co-ntact 36, contacts18 and 25 ot the .switch deivice 4, contact39,fa wire 101, a branchwire102, through :the magnet contact terminal 94 is the Vwire 92andc'onnect'ed to tlie'contact terminal 75 of the release tobe'deenergized. i `Uponthe deenergization of Athe connector 1.00V

'28 and 31 of the Vmagnet valve device 17 to Vgroundat'103,thusfmaintaining the magnet 75 energized and the brake cylinder ventedtoatmosphere by Way oi pipe and passagelOi, if'alve chamber openedY thuscontrolling switch device euisvoperated from' release po-sition toservice position. When the switchl device 4 Vis 'operated' from releaseposition the circuit througl'ithe magnet 75 ofthe release lmagnet valvevdevice 17 is deenergizing the magnet. Upon deencrgizationot thisjinagnetthe pres- Y vsure of a spring 107 'contained inthe valve Cia" f valvedevice f15, past the unseated valve 74' 40 chamber 105 of the magnet 83Vot' the door the magnet valve device 8,'he

the release magnet valve 1 device 17 causes the release valve 764closing off communication ofthebralre 'cylinder 16 with atmosphere.`'lVith the switch device 'je in service position Y and 37 engage the,contactslQ and22 of the' switch device, so thatf current from thebat-'- tery 136 supplied to the contact 36'will flow to themagnet73ofthe application magnet f valve devicel through contacts 19, 22v and37, fwire `108` andl a branch wire 109,"then through the magnet' togroundjat 110, thus cnergizingtlie Ymagnet 7 3.

' Upon the energization or the -magnet73 the application valve 74- willbe unseated against the pressure of a spring 'llglcontained in a valvechamber 112 and fluid under pres-V sure iiows :from the reservoir`V 14tothe brake cylinder 16 by way of pipe and passage 113, valve chamber112 in the application magnet stem', a passage 114 andpipe 1011,thuseiecting a service application of the brakes. Y Y j -t Now when thespeed ot the car has beenreduced to such an extent that the counter E.

M. F. ot the motor is not sufficient to maint ain switch device 13energized,- thc connectors '84 and 85 move doWni-vardlyto theirlowermost positions, in which the connecter Sli connectscontact'terminals 115 andV 116, the contact terminal 115 being connectedto ground at 117 and the contact terminal 116 being connected tothereturn Wire 116 from the door controlling magnets 8, 9,; and 11, and theconnector 85 connects contact terminals 119 and 120, the Contactterminal 119 being connected to a wirev 121 vwhich invturn is connectedto the contacts and 4510i the brake control switch devices eand 6, andthe contact terminal 120 being connected to the wire 109. Y f.

It' after the speed of thecar has been rcduced to a predetermined lowspeed, the operator desires to open the door controlled by maintains thetov seat,

the contacts 36 to. seat andthevalve to u relay magnetk door selectorswitch'device 54 in he operates the-selectoiswitch device'to theposition vas` indicated by the Yreference leti Assuming'the selectorYvalve device 5tofbe in 'the position shown; in the drawing, the

caroperat-ing'at slow speed, and they operas' Vtor operates the controlswitch device 4 from service position toV door open position, V the-contacts 36, 38 and 40 Will engage with 'the contacts 20, 241, and 26respectively `of the control switch device. W'ith the contactv 38 inengagement",Withy the contact 24, 'current supplied tow the' Contact 36will flow through the 'c ontactsjQO and 24 contact'28, a wire 122connected to Contact' terminalt, contact 46; of the selectorswitchfdevice, contacttermi-v nal ,1l-8, wire 123, inagnetjofthe device8, wire 118, Contact nec or 8&1, Contact terminal thus energizing the"magnet ot' thefmagnet magnet valve 'valve device A8. The contactv 16I ismade ot Vany suitable material which will conduct cur# rent from theYcontact ternii'nal47 to either or both of the contact termiiialseS Vand49 depending, `ot' course, uponm'the position et' thc Contact 46. y i l;Upon the energization ofthe magnet of the terminal116, coiifto ground117,

magnet V valve device 8,1thel valvetiejis caused 1 n A Vnseatagainst thepressure o t a spring124 contained in the valve chamber .67, theseating' of the valve 6K1 closing communication of the chamber 71V with''atmospheief .'lVith the valve; 65 lunseated `fluid, under 'pressureflows Yfrom VJthe reservoir 1,11 to` the piston chamber 70 of lthevalve' device 60 by; 69, chamber 67, past 'the unseated valve 65,'cliamberj71v and pipeand'passage 72. When the pressurejof'fluidv inpiston'chamber 70, acting on4 one sident the pist-on 61,V` issubstantially equal to the pressure of fluid in valve chamber 63,'actingon the other side ot the piston, the pressure of Y tained in the pistonchamber 70 and acting on one side of the piston 61,*causes the piston tooperate toshift the'slide valve 62 toward the left hand `to its dooropen position,in which. the piston chamber'511- oi" the door enr-v giiieis vented to the atmosphere byway. ot

passage 126, vcavity .127 in the vslide valve 62 and atmospheric passage128. Y In this poc sition of theslide'valve fluid under pressurepressureo'fzfiuid supplied to the pistonchamber 55'and acting on thepiston 57 causes the way `of pipe and passage ico a spring 125, conico -tion magnet valve device 15 open,

pistons 56 and' 57 andfrack bar 58 to move toward thelcft handto'noperate the quadrant to onen thedoor". i v f It Awill here be notedthatwhen the brake control switch i sition, the contact 37 is moved outo'fengagement with they contact 22 of the control s witch so thatN thecircuit through' the wire 108 and applicationmagnet isopen, but as theconnector 85 of the 'door relay magnet switch device 13 contacts. withthe contact terminals 119 and 12() and the contact 40 engages thecon'a'ct 26 of' the current is suppliedtliroughthe applicationmagnet 7 3by way of contact 3G, con-v tacts .20v and 26 oi' the switch device 1,contactvLiO, wire 121, contact terminal 119 conncctor 85,contactteifininal 112Q and wire 109 and aiull service application willresult.

Ifin eii'ecting an application of Athe brakes the operator moves thebrakecontrol switch device 4 to dooropen position before the speed ofthe car has been-reduced to a-predetermined low speed, the ycounter E.M. F. of the motor lrwill cause the magnet 830i the door relay magnetvalve device 13 to be maintained energized thus maintaining theconnectors 84 and S5 in their upper positions assho'wnin .the drawing.The connector 84 in its upper posi-l tion maintains the circuit throughthe magnet.

oi' the magnet valve devce 8 open, thus prevventing tlie opening ofthedoor, and the connector in its upper position, maintains the circuittliroughthe magnet 7 3 of the applical and since the contact 37`is outof engagement with the contact 22 of the control switch device 4, themagnet 7 3 will be deenergiz'edand the application valvek .74 seated, sothat' the lpressure of'iiuid in the brake cylinder 1 6 will not beincreased nor can it be increased without operating the switch 4toservice position again. Now whenthe speed of the car is jreduced to saidpredetermined lowspe'ed, i. e. when the counter E. M. FQo the motor 1 isnot'suiiicient to maintain the magnet 83 of the door relay magnet switchdevice 13 energized, the contact 3a moves downwardly `into contact withcontacts 115 and 116 thus completing the circuit through the magnetofthe magnet valve device 3 causing the door to open an the'contact 85moves downwardly into contact with the contacts 119 and 120 thuscompleting the circuitthrough themagnet 7 3 of the application magnetvalve dev1ce 15 causing the valve 74 toV unseat when Huid under pressureis again supplied to the brake cylin- Ader and a full vservice`application of 'the brakes result. 1 In effecting anemergency-application oi thebrakes, the contacts 36 4and 3T engagethecontacts -21 and 23 oi the bralrecontiol switch device l thus `closingVYa circuit through the magnet 73 of the application magnet valve device15 through which themagnet 3 is i is operatedtodoor open poswitch deviceenergized which results in aneinergency application `otithe brakeswithout in any way being interfered with by the relay, magnet switchAdevice 13. c

vIt will be s een'thatf with my vimproved safetyi car control equipment,the opening of the doors is dependent npon the speed of the car andnotnpon'thejudgment'oi the operater.- Q lheftermv predetermined lowspeed as usedin theforegoingspecification and appended-.clainis isintended to mean ak speed at which it would be safetoopenthe car doors.

liile one illustrative embodimentv ofthe inventionhas been described indetail',it is not my intention to Vlimitfits scope to that embodiment orotherwise thanjby the terms or the appended claims. 3

*Having-now Vdescribed `my invention, what l claim as new and desire tosecure vby Letters Patent-im-Q "f 1. In a car door'aiid brakecontrolling apparatus,the combination with mechanism ior controlling theopeningk of a 'car 'door and mechanism for effect-ing an application ofthe brakes, of means-operative Tto normally control the operation k o'lsaid mechanisms, and means operative or preventing the operation of bothvof said mechanisms, mentioned means is indoor open position, unless thespeed of the car. isreduced -to a prei determined low degree. A 2. 'liracar door and brake controlling apparatus, thecoinbination with mechanism'for controlling the opening oi a .car doorand when the liii-stmechanism for effecting an applicationo'i the brakes, of means tornormally controlling the operation ot said 4mechanisms, and meansoperative in accordancewiththe speed'of the both of said mechanisms car` 1for Erendering either operativeflor inoperative whenthe firstmentioned meansis, in door opening'iposition. a f.

V 3. Inga car door andV brake controlling apparatus,the combination withmechanismior controlling the opening of a car door and mechanism .foreffecting an application of the brakes, otmeans Jornormally controllingthe operation oiy said mechanisms, and electrical means operative forpreventing the operation ofboth of said mechanisms, lwhen the iirstmentioned means is 'in door open position, unless the speedv of the carisreduced to a predetermined low degree.' I f A 4. In a car door andbrake controlling apparatus, the combination with mechanism forcontrolling the opening of a car door and mechanism for eiiecting anapplication of the brakes, of means for normally controlling theoperation of said mechanisms, and electrical means including thecardriving motor operative for preventing the operation ot both ofsaid"mechanisms, when the first mentioned means is in door openposition, unless the iio ; specdof the car is reduced to a predeterminedloiv` degree; i

@CTI

'fratus, fthe, combination of the brakes,

saidfdoor en 5. lIna Ydoor and brake controlling appafWith'apdoorhengine operated byf fluid under: pressure 'for lconti'olling theopening andgclosing of afcar door, of means for supplyingfluid underpressure Y to said 'doorV ,engine to effect the .opening of the car,door, means for supplying Huid Vav brake cylinder, 'undery 'pressure tosaidbrake cylinder to effect an application and means i operated WhenAthe speedofthejcar exceeds a predetermined loiv speed -for'cuttingfoil" communications through which fluidnnder pressure issuppliedto gine and to'said ybrake cylinder.

Y 6. .Infa door and kbrake controlling appathe brakes,

vcontrol the l n ,'cpe'n the door and to eilectanapplieation of f andmeansisubject to the speed of the-,car 'for rendering said mechanismsoperativeor inoperative toJ openl the, door accordance f the brakes,"

i ratus, the combination the brakes, jcontrol the open the door andtofeffect an application of ratus, thefcombinationvvith a mechanism forcontrollingV the opening of a Acar door and mechanismv for keffectingan. application of operation' of said mechanisms to rendering saidmechanisms operative or inoperativ e,' Y

Aratus,'they "controlling the opening offa car ,door and V8. a doorbrake lcontrolling appacombination with a mechanism Afor Amechanism foreffecting application of the brakes, means operative to afposition tocontrol the operation ofsaidmechanismsfto open the door'and to eii'ect'an applicationof Y l'the brakes a magnet svvitchdevice operative yuponenergization to prevent the operation fof said mechanisms, 4,energization y to causev said..mechanisms to for controlling the ener-land operative upon deoperate', and means v ,gization and deenergizationof said magnet sivitchdevice in accordance'ivitli the speed of the' car.

. 9, In a door Aandbiake controlling appa-V ratus, tlie combination witha mechanism for -controlling the opening of acar door and the( brakes,

mechanism forietfectingan vapplication of means operative to apositionto Controlthe and means for vpreventing the operation-ofsaidmechanisms unless the speed-of l"the 1 car is mined low speed;

brake cylinder. means, operative to a position to speedfof the "carloyvspeed for preventing the operation of )an application jof operation'of said mechanisms to `openthe door and to eiiect an application of'thel brakes,

edueed t0 a predates -v In a car door and brake controllingapparatuafthe combination with a door engine and a brake cylinder,ofelectrically controlled means for supplying Huid un'der'pres`V suresimultaneously to said engine and Vbrake vv'cylinderto open thecar doorYand apply the j 'brakes onlywlie1i tlie speed ofthe train lis reducedftoai predeterminedV loW speed. ,Y

na car 'door andbrake controlling ll. I

apparatus,the combination 'with azdoor engineand a brakecylinder', ofelectrically con-A Y"trolled ineans'for vsupplying fluidjunder pres-`suresimultaneously to said engineand brake cylinder to open'tlie cardoor and apply the "brakes, and means 'operative WhenV the speed 'ofthe, car is greaterthaii 'afpredeterinined vloliv speed for preventingtheoper-ationlof said electrically,controlled means'to supply fluidunderV pressure to said door engine and 12. In a car doorl and lbrakecontrolling apparatus, the combinationwith a door engineoperativebyiiuid under pressure for vcontrolling the openingand closingof a car" 90 door; means `for supplying `fluid underpressure to saiddoor engine.to effect'the opening of the Vdoor,V means' operativebyfliiid under pressure,` foreffecting an application of the brakes,'and meansjoperative When the exceeds a; predetermined said door engineand the ineans'for edecting when 'thespeedof the car is reduced to saidpredeterminedlovv speed for causing said door `engine to operate to openthe door 'and the nieansor effecting an V'application of the brakes'tooperateto apply the brakes.

f 13.. In ai .cardoor andv brake 'controlling vapparatus, A thecombinationv with a 'door engine operative by fluid underpressui'e vforcontrollingthe'opening and closing `of a cai' door, means for supplyingsureto saiddoor engine to effect the opening of the' door,'meansoperative by liuid 'under pressure for effecting an vapplication of thebrakes, a manually operative switch device Y :tor simultaneouslyoperating said door en-H gine and means, and an automatically oper-v lativev switch Vdevice `controlled in accordance ivitlithespeed ofthecai' for rendering said engine' and means :operative or inoperative.

14,-. YIna door and kbrake controlling 'apparatus for a motordriveiivehi-cle, the conibination mth-a mechanism for controllinga Lvehicle door anda mechanism for controlling the brakes of meansforoperating both of said mechanisms simultaneously for opening the doorand eiecting an applicationof, the brakes, and means for preventing theoperation ofrfsa'id mechanismn meansv to open the door and apply thebrakes, including jan electrically ,controlled device having.its'circi'iitcontrolled according to :the

s by the operatingV the brakes and operative Huid under pres- Y` .virceor maintaining said circuit closed when current is being supplied 'sitosaid motor `and operative to open said circuit and to close a localcircuitthrough said motor When the current supply is cut off,l mechanismfor openation ot'both of said cylinder, of a .'fluid under pressurev toi i manually operative switch device` havingA a ving a'car door, amechanism for efectingan application ot the brakes, and means includedin said local motor circuit loper'atilvejin ac-.

cordance with Vcounter-electro-niotive-orce of said motor Jforcontrolling the -simultaneous operation of both of said mechanisms.

16. `lira door and 'brake controllingzapparatus for a motor drivenvehicle, the combination with a mechanism for operatingl a vehicle doorto open position anda mechanism for effecting an application' of thebrakes, of a manually operative switch-device and a inagiiet switchdevice'for controlling the opertrolling theo'peration' ofsaidmotor topropel the vehicle, said A net'sivitch device, a-m'agnet switch deviceoperative to open the motor circuit When-the power to said motor is cutoff and to close a circuit through said motor and magnet switch device,said magnet switch device being operative at one time bythe currentflowingthrough the first mentioned circuitfto irevent the operation ofthedoor opening" mechanism and'operative at another time by the'counter-electro-motive-torce of the motor` for preventing thesimultaneous operation ot both of said'mechanisins to open the .door andapply the brakes until the speed of the vehicle is reduced to apredetermined low-speed.'

apparatus, the combination-ivitliv a door engine operative by iuid underpressure i for opening and closing the car door and a brake magnet valvedevice operative to supply fluidunder pressure engine to open said door,a magnet valve device operative to supply fluid to the brake cylinder toeffect an application ot' the brakes, an electric circuit through whichthe operation or the second mentioned magnet valvev device is coVtroll'ed toV supply the brake cylinder, a

position jl'or closing said circuit, another electric circuit throi'ighwhich the' operation of the second mentioned magnetvalve deviceis con- Itrolled to supply fluid under pressure to the Hbralelcylinde'r, anelectricV circuit'through 'vvhich .the Yiirst meiitionedniagnet valve'device is controlled to supply liuid under presmentioned circuits opencircuits.

p i y means torrpreventing mechanisms, a vehicle propelling motor,anelectr'ic circuit 'for con. circuit including said Ymag-v params, A:tor` opening and clos 4 d to elect lanv application Aof 17. In a cardoor and b rakecoiitrollin'g'"l 'said mechanisms or causing to said=door Y under pressure tionedmechanism to open was? mentioned circuitisopenediorA closing "off'the supply of 'Huid unde mentionedcircuitsthrough the switch device, and means operated in accordanceVwith 'the r pressure' to the brake cylinder and for establishing thetvvo'last speed of thecar'for maintaining the,tfWojlas'tV i or" forclosing', "s afid'I 18.V In a car door and'brake controlling apiparatns, the combinationvvith a mechanism lor opening and closingfthecar dooranda mechanism for controlling the application SO and releaseVof the brakes, .oj'a manually operative switch device;V having oneposition forcontrolling the operation cfthe second'mentioned mechanismto eftectan Iapplication of thebr'akes and' having another positionfor'V controlling` the a operation Vof the `first y mentioned mechanismtoop'en'the door and "for tiret operatinnof Aboth controllingzthe''second' mentioned'niechanism Y to effect an l application ofthe brakes,and

yso

of said mechanisms tol openthevdoo'r 'and apply the brakes when csai'dmanuallyj operative switch' device is in itslast mentionedposition,

funtil the speed of y,the ,carv isre'duc'ed to' apre- 19.1In a cardoor."controlling ap the A combination' with a lmechanism l ingthecardoors, and a mechanism for controlling the application and release ofthe brakes, erat'ive, sivitch devicei having oneposition for controllingthe loperation of the'se'co'n'dl men'- ltioned mechanism to effect anyapplication of the brakes andhafving)anothergposition for controllingthe operation of theclirstv mentioned'mechaiiism to'open the doorv'andfor controlling the second mentioned mechanism the'br'akes, and

fme'ans governed'by the speed of' thecar for.

either preventingthe operation ofv bothbf erativeV switch is' 'in tion.

paratus, the combination with a' mechanism for opening and'closing thecar door anda.`

oa manually' op- 4 bothl of said me hanismsmtoioperate to open-the 'car'door 20'; lIii acardoor and'brake controlling apico mechanism forcontrolling the application and release of the brakes, of a-manirallyoperative switch: device having' one' position for controlling: theoperation:` ofthe second menv-tionedi mechanism to elect'an-Yapplication of the brakes yand having another position'ifor.

controlling the operation .oi the'iir'stl menthe doory and forcontr-rolling.' the second-mentioned mechanism to elfect an applicationyot the brakes, and electrically controlled means for .preventing theoperation of both of said mechanisms to izo i open the door and applythe brakes when saidl manually operative switch device is in its lastmentioned position, until the speed ofthe cal is reduced to apredetermined lovs7 speed.

A In testimony whereof I have hereunto set f my hand, this'eoth dayofoctober, 1,928.

VJOSFIPH o. MGUNE. o

